Lock for window sash



March 31. 1925.

1,531,901 F. D. CLARK LOCK FOR WINDOW sAsH Filed sept. e. 192s 2 sheets-snm 1 ATTORNEYS March 31. 1925. 1,531,901

F. D. CLARK LOCK FOR WINDOW SASH Filed sept. s. 192s 2 sheets-sheet 2 A TTORNE YS Patented Mar. 31, 1925,

UNITED STATES PATENT' OFFICE.

FRANK D. CLARK, or FRANKFORT, KENTUCKY.

LOCK FOR WINDOW SASH.

Application filed September To all whom t may concern.' t

Be 1t known that I, FRANK D. CLARK, a

citizen of the United States, and a resident This invention relates to locks for windowY sash and has for its object the provision of a device which will not only lock the window sash against unauthorized manipulaf tion from the outside but is adapted to lock the sash in such relationl to permit the ventilation of a room without permitting unauthorized persons from entering the room either above or below the depressed or elevated sashes. t f

A further object of the invention is the provision of a device adapted to lock a pair of sliding cooperating sashes in various spaced relation with the top and bottom of the window frame while cooperatively limiting the distance that an end of the sash may be removed from the adjacent portion of the window frame.

This linvention will be best understood from a consideration of the following detailed description, in view of the accompanying drawing forming a part of the specification; nevertheless it-is to be understood that the invention' is not confined to the disclosure, being susceptible of such changes and modications which shall define no material departure from the salient features of the invention as expressed in the appended claims.

In the drawings:

Figure 1 is a view in perspective showing my improved locking device applied to cooperative sashes slidably mounted in a window frame.

Figure 2 is a vertical section of the same.

Figure 3 is a fragmentary view in peu spective of a perforated locking plate adapted to be secured to a .window frame.

Figure 4 is a view in perspective of a locking plate provided with an additional bracing flange.

Figure 5 is a fragmentary view in perspective of a locking plate having a modi lied form of securing means for the plate.

Figure 6 is a view in perspective of the locking device with the parts in disengaged relation.

Figure 7 is a View ie perspective of the s, 1923. Serial No. 661,625.

parts of the bearing shown in Figure 6 as* sembled. Y

vFigure S shows a'modiiied form of the bearing formed of a single: piece of metal.

Figure 9 is a view in perspective of a further modified form of the window keeper.

Referring to the drawings, 1 designates the window sill, 2 the side members of the frame which are provided with beads 3, 4 and 5. The lower window sash 6 is adapted to ride in the track formed byl the beads 3 and 4 while sash 7 has its opposite ends riding in a track formed by beadsf4 and 5.

Upon the upper cross barV 8 of the lower sash 6 and at one corner is mounted a plate 9 by means of screws adapted to beY inserted through perforations 10 for lockingv the plate to said bars.

As shown more in detail in Figure 6 the plate has formed at one end a cylindrical member 11 which is adapted to receive a lock bolt 12. The cylindrical member is provided with a longitudinal groove 13 havlng a right angular extension or arcuate slot 14 opening into the groove 13. The opposite end of the cylindrical member is provided with a longitudinal groove 13a and a right angular extension of the groove at 14a. By providing similar but oppositely disposed grooves at opposite ends the meinber 9 may be applied either upon the left or right hand rside ofthe sash 6.

A second vplate 14l is provided wit-h a cylindrical. member 15 at one longitudinal edgewhich is adapted to receive the cylindrical member 11 with the plate 14 coinciding with the plate 9 and resting upon the same. The plate 9 is provided with a notch 16 which is adapted to receive a tongue 1'? cut from one edge of the plate 14 when the two plates are located in cooperative relation. The tongue 17'is then forced downwardly into the notch 16 for aiding in. inamtaining the plates inv position. A slot 15 at the base of member 15 is adapted to receive a. portion of member 11 which is adjacent its connection with plate 9.

A screw 18 is adapted to be inserted through a perforation 19 at the rear of the cylindrical` member 15 and threaded into perforation 20 at the rear of cylindrical. member 11, These perforations are shown in dotted lines in Figure 6. When the screw the bearing for 18 is forced home into the threaded perfof,

= metal cylindrical sockets 27.

cylindrical members are locked together. The head of the screw 18 conforms to the curvature of the cylindrical member 15 and its outer end lies flush with the wall of said member so that the screw does not project beyond the member 15.

When the plates 9 and 14 are locked together the bolt 12 is inserted within the cylindrical member 11 until a shoulder 21 on said bolt abuts the outer end 22 of member 11 and the free end of the keeper prej'ects beyond the opposite end of the lcylindrical member 11.

A. square headed screw 23 forming a locking lug is screwed into a threaded passage in the end of therbolt. 12. The bolt may be withdrawn'until the screw 23 abuts the inner end `of 'the slot 24 when the bolt may be turned by the finger piece 25 and the screw located in the groove 14a. This operation locks the boltv in position within the Acj'fli'ndrical member 11.

rIfhe side bar 26 of the sash 7 is provided with p'erforations adapted to received the The metal is cut away to form a longitudinal slot '28 and a right angular slotted extension 29. A rib formed on the outer wall of the socket 27 adapted to engage in a groove projecting laterally from the perforation in the bar 26 of sash 7 to prevent turning of the socket. A screw '31 mounted in a perforation in the bottom of the socket 27 is screwed into the bar 26 and maintains the socket in position within a perforation in said bar.

As 'shown in Figure 2 the sockets 27 are spaced. at a certain distance apart andfor a purpose 'which willbe presently described.

A metal keeper plate provided with a plurality of key slots 33 through which the end of the bolt 1'2 is inserted when `said endis Ipositioned within the socket 27 and locked in place by the set screw 23 'when disposed in the right angular extension 29 of the slot 28. The plate 32 is provided with :a 'lateral extension 34 which is adapted to 'be screwed to the bead 4 and thereby Vheld in place. One of the sockets 27 is located in a perforation adjacent the lower' transverse bar 35 of the sash 7 while Athe other socket 27 is loca-tedat a point slightly below the center of the sash 7A It will be seen by this arrangement that when the bolt 12 has been moved into engagement with the lower socket 27 and through a key slot 33 of the 32 that the windows 'will be locked in closed relation. When the lower sash 6 is elevated and the end of the bolt is inserted yin any of the higher key slots the window may be maintained in position to admit air beneath the bottom of the sash.

The upper saslrmafy be lowered'so that the upper socket v27 may aline with any of the key 'slots in the bar 32, and when the sash 6 is elevated to a point where lthe bolt 12 will aline with such key hole and the upper socket 27, the bolt may be shoved home in said socket until the shoulder abuts the end 22 of the cylindricalI member 11 when the bolt may be turned to the right for positioning the screw 23 in the slot 29 thereby locking the bolt in position and likewise the two sash. 1n this locked position the sash 7 will be spaced from the upperl end of the window frame while the lower sash will be spaced from the sill 1 and pro vide ventilation at the top and bottom of the window.

The key slot 33 may be so positioned along the plate 32 to provide such a spacing' of the two sash from the opposite ends ofthe window frame anda scale 36 may be located on the side bar of the sash 7 in order to determine the distance the lower sash located from the sill 1 and the distance the sash 7 is located from' the upper end'of thewindow frar'ne.`

As shown in Figure 4 the plate 32a is not only provided with a securing ilange i 34- butwith a right angular extending flange 37 which is adapted to abut the longitudinal edge ofthe bead 4. The member 37 is morticed within the bead 4 for slid-ing et the sash 6. y

Figure vdiscloses a further modiiieation of the plate shown in Figure l3. This plate 32b is not ronly provided with the securing flange 34, a reinforcing flange 37, but is also provided with a third extension 33 which is adaptedto be mort-iced in the side bar 2 of the window 'frame and on the outer `surface of which one edge of the sash 6 rides. The extension 38 is located between the beads 3 and 4 and is secured 'to Vthe side aar of the window fra-me by means ef2 screws.

Instead of the bearing for the bolt 12 being formed olf'two separate members, the same may be constructed of a single piece of metal having a plate 39 and a cylindrical extension 4() formed integrally with ythe plate. At the rear edge of the cylindrical member 40 is formed a hollow rib 41 which provides a groove 42 and groove 43 formed at right angles to the groove 42. The groove 42 is adapted to receive a square head screw 23 and groove 43 provides means for receiving the screw and for locking the member 12 in position. Y

As shown in Figure 9 a plate 44 is provided with an integrally formed'cylindrical member 45, the metal of which Yis made of thicker' material than the cylindrical member shown in Figures 6 and S so that it `is possible to-cut a longitudinal groove 46 and a right angular extension 47 ofthe groove? in one wall of the 'cyindricall member 45.

What I claim is:

1. A. sash lockconstruction comprising `a pair of cooperative window( sash slidable in a window frame, a cylindrical member providing a bearing and mounted on the upper end of one of said sash, said cylindrical member being provided at its opposite ends with longitudinal grooves and arcuate grooves opening into the inner ends of the longitudinal groove, a lock bolt slidable in the bearing with its opposite ends projecting beyond the ends of the bearing, the inner projecting ends of said bolt being provided with a laterally disposed lug, said lug slidable in a longitudinal groove and adapted to be received by an arcuate groove for locking the bolt in an inoperative position, a keeper plate provided with a plurality of key slots mounted in a fixed position approximate ofi adjacent ends of the window sash, a pair of spaced sockets in one window sash adapted to receive the inner end of the bolt for locking the sash in a predetermined spaced relation.

2. A sash lock construction comprising a pair of cooperative window sash slidable in a window frame, a cylindrical member providing a bearing and mounted on the upper end of one of said sash, a lock bolt slidable in the bearing and provided at its outer end with a finger piece and shoulder adapted to abut the outer end of the cylindrical member, the inner end of the bolt projecting beyond the inner end of the bearing and provided with a laterally disposed lug, said cylindrical member being provided at its opposite ends with longitudinal grooves and arcuate grooves opening into the inner ends of the longitudinal groove, said lug being slidable in the longitudinal groove and adapted to be received by an arcuate groove when the inner end of the bolt is withdrawn into the cylindrical member for locking the bolt in an inoperative position, a keeper plate provided with a plurality of spaced key slots and mounted in a fiXed position on the window frame and extended vertically upward from the upper end of the lower window sash, the upper window sash being provided with a pair of spaced sockets adapted to aline with the key slots in the keeper plate, the inner end of the bolt being adapted to be inserted through these keyslots and received by one of' the sockets in the upper window sash whereby both sash may be locked in various spaced relations from the opposite ends of' the window traine.

3. In a sash construction, a bolt for locking a pair of sash in open spaced relation, a bearing for said lock bolt, said bearing comprising a plate adapted to be secured to the upper end of the lower window sash, a cylindrical member formed at one end of the plate and provided with a longitudinal groove at one end and an arcuate shaped groove circumferentially disposed on said cylindrical member and opening into the inner end of' the longitudinal groove, a sheath adapted to receive the cylindrical member, a plate extending from the sheath and adapted to lie in close contact with the first mentioned plate.

4C. In a sash construction, a bolt for locking a pair of sash in open spaced relation, a reversible bearing for said lock bolt, said bearing comprising a plate adapted to be secured to the upper end of the lower window sash, a cylindrical member or sheath provided with longitudinal grooves at its opposite ends with arcuate grooves opening into the inner ends of the longitudinal grooves,

whereby said bearing may be applied to eitlliler side of the upper end of the lower sas 5. In a sash construction, a bolt for locking a pair of sash in open spaced relation, a bearing for supporting the bolt, said bearing comprising a plate adapted to be screwed to the top of the lower window sash, a cylindrical member formed at one end of the l plate provided with longitudinal grooves at its opposite ends and arcuate grooves opening into the inner ends of the longitudinal grooves, one side edge of the plate being` provided with a notch, a second plate adapted to be mounted on the first mentioned plate and provided with a tongue along one edge adapted to be depressed into the notch of the first mentioned plate, a cylindrical member formed at the opposite edge of the second plate and provided with a longitudinal slot at its lower end adapted to receive the connection between the first mentioned plate and its respective cylindrical member when the second cylindrical member telescopes the first mentioned cylindrical member, whereby the second mentioned plate is locked to the first mentioned plate with the second plate covering the securing means of the first mentioned plate,

FRANK I). CLARK. 

